I don't use the on/off power selection, although from my past experience, I should.
One of my first two
mods was an Altsmoke BB. I started tossing my BB into a side pants pocket hanging in my locker at work. I would stealth
vape duing breaks at work. One time I went for a few vapes and reached into my pocket to grab the BB and it was too HOT to touch.
Long story made short; the fire button had become compressed in my pocket, causing the battery to short out and vent. The BB did what it was designed to do by venting the hot gasses
through the fire button, but the switch was soon to need replacement. Below is that battery, which was a "protected" Trustfire battery, by the way.

